Checked with http://kernel.ubuntu.com/~kernel- ppa/mainline/v4.1-rc3-unstable/ The issue is still present.
root@ubuntu1504:/mnt# uname -a Linux ubuntu1504 4.1.0-040100rc3-generic #201505102036 SMP Mon May 11 00:37:27 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux In dmesg we still see : [ 57.402313] sdb: [ 117.432523] blk_update_request: critical target error, dev sdb, sector 0 [ 133.723833] sdb: sdb1 [ 193.752349] blk_update_request: critical target error, dev sdb, sector 0 [ 304.792591] blk_update_request: critical target error, dev sdb, sector 0 [ 364.844409] blk_update_request: critical target error, dev sdb, sector 0 ** Tags added: kernel-bug-exists-upstream -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1439780 Title: [Hyper-V] Fiber Channel critical target error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1439780/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs